By Paul Elias Associated Press SAN FRANCISCO -- Employers can fire workers who use medical marijuana even if it was legally recommended by a doctor, the California Supreme Court ruled Thursday, dealing the state another setback in its standoff with federal law enforcement.

When Gary Ross was ordered to take a drug test at his new job, the recently hired computer tech had no doubt the results would come back positive for marijuana.

When Gary Ross was ordered to take a drug test at his new job, the recently hired computer tech had no doubt the results would come back positive for marijuana. But along with his urine sample, Ross submitted a doctor's recommendation that he smoke pot to alleviate back pain.